Switch.



M. G.ARNOLD.

SWITCH.

I APPLICATION FILED AUG. B, 1913. 1, 1 1 9,670. .Patented Dec. I, 1914.

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THE MORRIS PETERS C0 PHOTO-LITHO.. WASHINGTON. D. C4

M. C. ARNOLD.

SWITGH.'

APPLICATION FILED AUG. 8, 1913.

1,1.1 9,670. Patented Dec. 1,1914.

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Mount? ing circuits. I also aim to provide'a switch MASON-C. ARNOLD, HASTINGS, NEBRASKA.

SWITCH.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Application sled august s, 1913. seriaino. 783,835'.

T0 all whom t may concern Be it known that I, MASON C. ARNOLD, a citizen of the United States, residing at Hastings, in the county of Adams and State of Nebraska, have invented new and useful Improvements in Switches, of which the following is a specification.

The present invention relates to improvements in switchesA for telegraph stations.

In carrying out my invention I propose to provide a switch board for local circuits in telegraph stations which is wired to any number of setsl of telegraph instruments all having a single or common resonator which may be cut 1n on any'of the circuits so that a message coming over a particular wire may be taken from the resonator, and

the sounder of this particular. circuit out out, without interfering with the. running of the other local Sounders of the remainof this character whereby either the sounder or resonator may be brought into operation, one independent of the other and also wherein both the sounder and the resonator can not be simultaneously operated.

A still further object of the invention is the provision of a switch whereby both the sounder and resonator may be cnt olf from any of the local circuits of the station, and also whereby the resonator which is common to all of thecircuits may be cut in on any of the remaining lines. i

A still further object of the invention is the provision of a switchboard provided with a number of switch buttons that are operated av limited sliding movement, to direct an electric currenttoa sounder when ,the button is moved to its limit in` one the provision of a switch,for the purpose set forth, which will embody the desired features of simplicity of construction, cheap- ,ness to manufacture, and ease and surety 1n operation. v y l With'the above objects inv view, and" others Awhich will appearv as the ynature "of the inveilfieflli's mers fellieedrstoed, ,the jim:

provement resides in the construction, combination and arrangement of parts set forth in the following specification and falling within the scope of the appended claims;

For the purpose of illustration the accompanying drawings adequately disclose a simple vreduction of the improvement to practice, and in the drawings Figure 1 is a diagrammatic view of a local terminal of an ordinary open telegraph circuit constructed in accordance with the present invention and provided with theA improved switch. Fig. 2 is a detail perspective view of a switch boardconstructed in accordance lwithl the present invention. Fig. 8 is aplan view of the inner'plate of the switch, the outer plate or collar lbeingl removed. Fig. 4 is a sectional view upon the line lr- 4 of Fig. 3. Fig. 5 is a detail similar sectional yview on a larger scale through one of the push buttons.

The improvement is illustrated in connection with the ordinary Morse open circuit telegraph system. It is to be understood that the showing in the drawingsk is merely for the purpose of illustration, 'and that the device may be employed in connection with a closed or open 'circuit of any electric system.

"In the drawings, I have shown a local station, which is designated by the numeral 1, and which is equipped with any number of telegraph instruments. In the said showing of Fig. 1 of the drawings, I have Aillustrated three main lines, designated by the letters A, B and G respectively veach vof which has its terminalA 3 connected 'with a relay l2 which communioates with the sounder circuits A, B and C respectively, the sounder' of the circuit A adapted to receive messages over the main line wire A, the sounder of the circuit ture of each ofthe sounders is designated by I thev numeral 8 while the wire `from the sounder of each of the circuits is designated. by the numeral 11, the said wire terminating in a contact 12 which is arranged adjacent relay 2. The-second or battery wire 13 of each of the circuits has its terminal connected with the contact finger 14 that is arranged upon a switch board 15. One of the wires 16 of the resonator 5 terminally contacts with each of the wires 11, and the second or battery wire 17 of the said resonator terminally connectsv with a finger 1S provided upon a conductor plate 19 that is arranged upon the switch board 15. The plate 19 is provided with fingers 18 to cor respond with the number of sounder circuits within the station, in the present instance the said plate being provided with three of the ngers 1S which are arranged upon the switch board diametrically opposite, but at a suitable distance away from each of the fingers 14. The board is, of course, insulated and is provided with contact plates 2O corresponding in number with the contact members 14 and 18. These plates 20 have one of their ends or edges offset to provide angular portions 21, and the said angular' portions at all times frictionally engage with the sliding contact plates 22, and the said plates 22 are adapted to be moved upon a board to bring the same into engagement with either of the fingers 14 or 18, for a purpose which will presently be understood, or, the said plates 22 may be retained intermediate of and out of contact with the fingers 14 and 18, also for a purpose which will be presently set forth. The top or removable cap of the switch board is formed with a plurality of longitudinally extending slots or openings 23, three in number corresponding to the number' of contact fingers and contact members, and the said contact members 22 are provided with adjustable elements in the nature of headed screws 22, which pass through the slots 23 to within threaded orifices provided upon the under faces of slidable `push buttons 24. Each of the push buttons. comprises a substantially rectangular member which has its upper fiat central portion milled as at 25, and corners of the said upper faces of the buttons yare scalloped or rounded in opposite directions, toward their ends, from the said central milled portion 25, whereby the operators fingers may freely engage with the buttons to slide the same. The transverse walls provided by the slots 23 are adapted to form stops which are contacted by the connected members 22 of the contact plates 22, so that the movement of the push buttons 24 is limited in both directions. Connected with each of the contact plates 20 is a branch wire 27 which leads to the armature 28, of each of the relays 2, and it is to be understood that the second wire of each of the relays is grounded, or that the said second wire may connect with the trans- .mitten We will suppose that allof the main linesv at all times over each of the three wires and that the instruments are working continuously. Each main line wire is, of course, carrying a separate and distinct message and each relay manipulating the sounder set opposite, so that all of the Sounders are running at the same time each repeating a different message.

l/Ve will suppose that the Sounders and the circuits B and C interfere with the copy ing of the message coming over the main lines wire A, and, as is well known the resonator instrument 5 produces a louder sound than the Sounders 4, and it is therefore desirable that the said message be copied from the resonator instrument. To accomplish this the button 24, upon the right hand side of the switch is moved to bring its contact member 22 out of engagement with the finger 14 and into contact with the finger 18 of the conductor plate 19. rlhis will cut out the sounder 4 of the circuit A and connects the resonator' 5 with the top relay 2 of the main line A, and so the message is received on the resonator sounder, and does not interfere with or disturb the other' two local Sounders. lf the operator hears his call at the sounder 4 of the circuit B', the middle or central button 24 has its contact 22 moved from the finger 14 to engage with the central finger 18 of the conductor plate 19, which cuts out the middle local Sounders and connects the resonator on the middlek relay, and the same is true with the sounder of the circuit C', but in this latter instance the outer and left-hand push button 24 is moved to bring its contact 22 out of engagement with the finger 14 and into engagement with the left-hand finger' 18 of the conductor plate 19 and it will thus be understood that the resonator may be cut in on any one of the three main lines without interfering with the Sounders on the other two wires, and that when the resonator is cut in on any wire the local sounder for that wire is cut out and the relay manipulates the resonator sounder only, giving the operator a single sounder to copy from and instead of having two Sounders manipulated by the same relay at the same time. It will be further understood that by sliding all of the members 24 to bring their contact member 22 out of engagement with any of the tongues or fingers 14 and 1S all of the Sounders are cut out as is the resonator.

By reference to Figs. 2, 4 and 5 of the drawings, it will kbe noted that the outer plate or cover of the switch board is formed for longitudinal extending ribs 30 which are arranged a suitable distance from the opposite longitudinal walls of the slots 23, and these ribs 30 are contacted by the inner sides of the outer push vbuttonsand by `both 4of the sides of the central push button and so serve as guides for the said push buttons.

It will be also noted that there is one slide or button upon the switch for each mam line wire, and it is, of course, to be understood that any number ,of "slides or push buttons coacting with contact members, as above described, may be arranged uponthe switch to accommodate as many main -linefv having a circuit foreach of the relays, and

a single resonator common to all of the sounder circuits,a switch having a conductor plate provided withffingers and wired to the resonator, Contact fpointsupon the switch spaced from the'ingers of the conductor plate and leading tothe battery wires of the sounder circuits, plates disposed between the ingers and Contact points and wired to the armatures of the relays, slid-p. ing push buttons upon the switch having contact plates and normally engaging with the contact points disposed opposite. the

fingers kof the conductor plate, substantially l as and for the purpose set forth.

2. The combination with a local telegraph station having main lines leading thereto, a relay for each of the main lines, a sounder having a circuit for each of the relays, and a single resonator common to all of the sounder circuits, aswitch having a conductor plate .provided with fingers and w-ired to the resonator, contact points upon the switch spaced from the lingersof the conductor plateand leading to the battery wires of the sounder circuits, plates disposed be-l tween the fingers and contact points' and wired to the armature of the relays, and means comprising slidable switch buttons corresponding in number with the main lines and having contact members disposed opposite the fingers of the contact plate and f whereby the` resonator maybe cut in on any one of the main lines without interfering with the Sounders on the remaininglines.

In testimony whereof aflix my signa,- ture in presence of two witnesses.

t i' MASON C. ARNOLD. Witnesses:

JOHN F. BRAMBLE, MORRISG. MARTIN.

(201mml of thin pltent may be obtained for ive cents each, by addressing the Commissioner otlatents, i

' Washington, D. C. 

